Gag reflex

Gag Reflex

The gag reflex or pharyngeal reflex is a reflex contraction of the back of the throat, evoked by touching the roof of the mouth, the back of the tongue, the area around the tonsils, the uvula, and the back of the throat. It prevents choking and regulates the flow of food and drink into the digestive system.

Physiology

The gag reflex is a protective mechanism that prevents foreign bodies from entering the throat and potentially blocking the airway. It is triggered when certain sensitive areas of the throat are touched, including the uvula, the tonsils, the back of the tongue, and the roof of the mouth. The reflex is mediated by the glossopharyngeal nerve and the vagus nerve, both of which are cranial nerves.

Clinical significance

In a clinical setting, the gag reflex is often tested during a neurological examination. It can be an important indicator of the health of the nervous system, as a diminished or absent gag reflex may suggest a neurological problem.

The gag reflex can also be a factor in various medical procedures, such as endoscopy and intubation. In some cases, it may be necessary to suppress the gag reflex, which can be achieved with the use of local anesthetics.

Variations

There is considerable variation in the sensitivity of the gag reflex among individuals. Some people have a very sensitive gag reflex and may gag easily, while others may have a diminished or even absent gag reflex.

See also

• Swallowing
• Choking
• Heimlich maneuver
• Airway management

References

Gag reflex Resources
Latest articles Most recent articles Ongoing trials	Wikipedia